<?php
/*
 * Notice: This file has been modified by the pH7Builder development team (well by Pierre-Henry Soria) <http://ph7cms.com>
 * Version now compatible with PHP 5+ and PHP 7+ (like PHP4 constructors have been move to PHP5 constructors because the old one wasn't working anymore with newer PHP version).
 */
defined('PH7') or exit('Restricted access');

use PH7\Framework\Translate\Adapter\Gettext\StreamReader;
use PH7\Framework\Translate\Adapter\Gettext\StringReader;
use PH7\Framework\Translate\Adapter\Gettext\FileReader;
use PH7\Framework\Translate\Adapter\Gettext\CachedFileReader;


/*
   Copyright (c) 2005 Steven Armstrong <sa at c-area dot ch>
   Copyright (c) 2009 Danilo Segan <danilo@kvota.net>

   Drop in replacement for native gettext.

   This file is part of PHP-gettext.

   PHP-gettext is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   PHP-gettext is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with PHP-gettext; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/
/*
LC_CTYPE        0
LC_NUMERIC      1
LC_TIME         2
LC_COLLATE      3
LC_MONETARY     4
LC_MESSAGES     5
LC_ALL          6
*/

// LC_MESSAGES is not available if php-gettext is not loaded
// while the other constants are already available from session extension.
if (!defined('LC_MESSAGES')) {
    define('LC_MESSAGES', 5);
}

require __DIR__ . PH7_DS . 'streams.php';
require __DIR__ . PH7_DS . 'gettext.php';


// Variables

global $text_domains, $default_domain, $LC_CATEGORIES, $EMULATEGETTEXT, $CURRENTLOCALE;
$text_domains = array();
$default_domain = 'messages';
$LC_CATEGORIES = array('LC_CTYPE', 'LC_NUMERIC', 'LC_TIME', 'LC_COLLATE', 'LC_MONETARY', 'LC_MESSAGES', 'LC_ALL');
$EMULATEGETTEXT = 0;
$CURRENTLOCALE = '';

/* Class to hold a single domain included in $text_domains. */

class domain
{
    var $l10n;
    var $path;
    var $codeset;
}

// Utility functions

/**
 * Return a list of locales to try for any POSIX-style locale specification.
 */
function get_list_of_locales($locale)
{
    /* Figure out all possible locale names and start with the most
     * specific ones.  I.e. for sr_CS.UTF-8@latin, look through all of
     * sr_CS.UTF-8@latin, sr_CS@latin, sr@latin, sr_CS.UTF-8, sr_CS, sr.
     */
    $locale_names = array();
    $lang = null;
    $country = null;
    $charset = null;
    $modifier = null;
    if ($locale) {
        if (preg_match("/^(?P<lang>[a-z]{2,3})"              // language code
            . "(?:_(?P<country>[A-Z]{2}))?"           // country code
            . "(?:\.(?P<charset>[-A-Za-z0-9_]+))?"    // charset
            . "(?:@(?P<modifier>[-A-Za-z0-9_]+))?$/",  // @ modifier
            $locale, $matches)) {

            if (isset($matches["lang"])) $lang = $matches["lang"];
            if (isset($matches["country"])) $country = $matches["country"];
            if (isset($matches["charset"])) $charset = $matches["charset"];
            if (isset($matches["modifier"])) $modifier = $matches["modifier"];

            if ($modifier) {
                if ($country) {
                    if ($charset)
                        array_push($locale_names, "${lang}_$country.$charset@$modifier");
                    array_push($locale_names, "${lang}_$country@$modifier");
                } elseif ($charset)
                    array_push($locale_names, "${lang}.$charset@$modifier");
                array_push($locale_names, "$lang@$modifier");
            }
            if ($country) {
                if ($charset)
                    array_push($locale_names, "${lang}_$country.$charset");
                array_push($locale_names, "${lang}_$country");
            } elseif ($charset)
                array_push($locale_names, "${lang}.$charset");
            array_push($locale_names, $lang);
        }

        // If the locale name doesn't match POSIX style, just include it as-is.
        if (!in_array($locale, $locale_names))
            array_push($locale_names, $locale);
    }
    return $locale_names;
}

/**
 * Utility function to get a StreamReader for the given text domain.
 */
function _get_reader($domain = null, $category = 5, $enable_cache = true)
{
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (!isset($domain)) $domain = $default_domain;
    if (!isset($text_domains[$domain]->l10n)) {
        // get the current locale
        $locale = _setlocale(LC_MESSAGES, 0);
        $bound_path = isset($text_domains[$domain]->path) ?
            $text_domains[$domain]->path : './';
        $subpath = $LC_CATEGORIES[$category] . "/$domain.mo";

        $locale_names = get_list_of_locales($locale);
        $input = null;
        foreach ($locale_names as $locale) {
            $full_path = $bound_path . $locale . "/" . $subpath;
            if (file_exists($full_path)) {
                $input = new FileReader($full_path);
                break;
            }
        }

        if (!array_key_exists($domain, $text_domains)) {
            // Initialize an empty domain object.
            $text_domains[$domain] = new domain();
        }
        $text_domains[$domain]->l10n = new gettext_reader($input,
            $enable_cache);
    }
    return $text_domains[$domain]->l10n;
}

/**
 * Returns whether we are using our emulated gettext API or PHP built-in one.
 */
function locale_emulation()
{
    global $EMULATEGETTEXT;
    return $EMULATEGETTEXT;
}

/**
 * Checks if the current locale is supported on this system.
 */
function _check_locale_and_function($function = false)
{
    global $EMULATEGETTEXT;
    if ($function and !function_exists($function))
        return false;
    return !$EMULATEGETTEXT;
}

/**
 * Get the codeset for the given domain.
 */
function _get_codeset($domain = null)
{
    global $text_domains, $default_domain, $LC_CATEGORIES;
    if (!isset($domain)) $domain = $default_domain;
    return (isset($text_domains[$domain]->codeset)) ? $text_domains[$domain]->codeset : ini_get('mbstring.internal_encoding');
}

/**
 * Convert the given string to the encoding set by bind_textdomain_codeset.
 */
function _encode($text)
{
    $target_encoding = _get_codeset();
    if (function_exists("mb_detect_encoding")) {
        $source_encoding = mb_detect_encoding($text);
        if ($source_encoding != $target_encoding)
            $text = mb_convert_encoding($text, $target_encoding, $source_encoding);
    }
    return $text;
}


// Custom implementation of the standard gettext related functions

/**
 * Returns passed in $locale, or environment variable $LANG if $locale == ''.
 */
function _get_default_locale($locale)
{
    if ($locale == '') // emulate variable support
        return getenv('LANG');
    else
        return $locale;
}

/**
 * Sets a requested locale, if needed emulates it.
 */
function _setlocale($category, $locale)
{
    global $CURRENTLOCALE, $EMULATEGETTEXT;
    if ($locale === 0) { // use === to differentiate between string "0"
        if ($CURRENTLOCALE != '')
            return $CURRENTLOCALE;
        else
            // obey LANG variable, maybe extend to support all of LC_* vars
            // even if we tried to read locale without setting it first
            return _setlocale($category, $CURRENTLOCALE);
    } else {
        if (function_exists('setlocale')) {
            $ret = setlocale($category, $locale);
            if (($locale == '' and !$ret) or // failed setting it by env
                ($locale != '' and $ret != $locale)) { // failed setting it
                // Failed setting it according to environment.
                $CURRENTLOCALE = _get_default_locale($locale);
                $EMULATEGETTEXT = 1;
            } else {
                $CURRENTLOCALE = $ret;
                $EMULATEGETTEXT = 0;
            }
        } else {
            // No function setlocale(), emulate it all.
            $CURRENTLOCALE = _get_default_locale($locale);
            $EMULATEGETTEXT = 1;
        }
        // Allow locale to be changed on the go for one translation domain.
        global $text_domains, $default_domain;
        if (array_key_exists($default_domain, $text_domains)) {
            unset($text_domains[$default_domain]->l10n);
        }
        return $CURRENTLOCALE;
    }
}

/**
 * Sets the path for a domain.
 */
function _bindtextdomain($domain, $path)
{
    global $text_domains;
    // ensure $path ends with a slash ('/' should work for both, but lets still play nice)
    if (substr(php_uname(), 0, 7) == "Windows") {
        if ($path[strlen($path) - 1] != '\\' and $path[strlen($path) - 1] != '/')
            $path .= '\\';
    } else {
        if ($path[strlen($path) - 1] != '/')
            $path .= '/';
    }
    if (!array_key_exists($domain, $text_domains)) {
        // Initialize an empty domain object.
        $text_domains[$domain] = new domain();
    }
    $text_domains[$domain]->path = $path;
}

/**
 * Specify the character encoding in which the messages from the DOMAIN message catalog will be returned.
 */
function _bind_textdomain_codeset($domain, $codeset)
{
    global $text_domains;
    $text_domains[$domain]->codeset = $codeset;
}

/**
 * Sets the default domain.
 */
function _textdomain($domain)
{
    global $default_domain;
    $default_domain = $domain;
}

/**
 * Lookup a message in the current domain.
 */
function _gettext($msgid)
{
    $l10n = _get_reader();
    return _encode($l10n->translate($msgid));
}

/**
 * Alias for gettext.
 */
function __($msgid)
{
    return _gettext($msgid);
}

/**
 * Plural version of gettext.
 */
function _ngettext($singular, $plural, $number)
{
    $l10n = _get_reader();
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Override the current domain.
 */
function _dgettext($domain, $msgid)
{
    $l10n = _get_reader($domain);
    return _encode($l10n->translate($msgid));
}

/**
 * Plural version of dgettext.
 */
function _dngettext($domain, $singular, $plural, $number)
{
    $l10n = _get_reader($domain);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Overrides the domain and category for a single lookup.
 */
function _dcgettext($domain, $msgid, $category)
{
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->translate($msgid));
}

/**
 * Plural version of dcgettext.
 */
function _dcngettext($domain, $singular, $plural, $number, $category)
{
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->ngettext($singular, $plural, $number));
}

/**
 * Context version of gettext.
 */
function _pgettext($context, $msgid)
{
    $l10n = _get_reader();
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Override the current domain in a context gettext call.
 */
function _dpgettext($domain, $context, $msgid)
{
    $l10n = _get_reader($domain);
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Overrides the domain and category for a single context-based lookup.
 */
function _dcpgettext($domain, $context, $msgid, $category)
{
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->pgettext($context, $msgid));
}

/**
 * Context version of ngettext.
 */
function _npgettext($context, $singular, $plural)
{
    $l10n = _get_reader();
    return _encode($l10n->npgettext($context, $singular, $plural));
}

/**
 * Override the current domain in a context ngettext call.
 */
function _dnpgettext($domain, $context, $singular, $plural)
{
    $l10n = _get_reader($domain);
    return _encode($l10n->npgettext($context, $singular, $plural));
}

/**
 * Overrides the domain and category for a plural context-based lookup.
 */
function _dcnpgettext($domain, $context, $singular, $plural, $category)
{
    $l10n = _get_reader($domain, $category);
    return _encode($l10n->npgettext($context, $singular, $plural));
}


// Wrappers to use if the standard gettext functions are available,
// but the current locale is not supported by the system.
// Use the standard impl if the current locale is supported, use the
// custom impl otherwise.

function T_setlocale($category, $locale)
{
    return _setlocale($category, $locale);
}

function T_bindtextdomain($domain, $path)
{
    if (_check_locale_and_function()) return bindtextdomain($domain, $path);
    else return _bindtextdomain($domain, $path);
}

function T_bind_textdomain_codeset($domain, $codeset)
{
    // bind_textdomain_codeset is available only in PHP 4.2.0+
    if (_check_locale_and_function('bind_textdomain_codeset'))
        return bind_textdomain_codeset($domain, $codeset);
    else return _bind_textdomain_codeset($domain, $codeset);
}

function T_textdomain($domain)
{
    if (_check_locale_and_function()) return textdomain($domain);
    else return _textdomain($domain);
}

function T_gettext($msgid)
{
    if (_check_locale_and_function()) return gettext($msgid);
    else return _gettext($msgid);
}

function T_($msgid)
{
    if (_check_locale_and_function()) return _($msgid);
    return __($msgid);
}

function T_ngettext($singular, $plural, $number)
{
    if (_check_locale_and_function())
        return ngettext($singular, $plural, $number);
    else return _ngettext($singular, $plural, $number);
}

function T_dgettext($domain, $msgid)
{
    if (_check_locale_and_function()) return dgettext($domain, $msgid);
    else return _dgettext($domain, $msgid);
}

function T_dngettext($domain, $singular, $plural, $number)
{
    if (_check_locale_and_function())
        return dngettext($domain, $singular, $plural, $number);
    else return _dngettext($domain, $singular, $plural, $number);
}

function T_dcgettext($domain, $msgid, $category)
{
    if (_check_locale_and_function())
        return dcgettext($domain, $msgid, $category);
    else return _dcgettext($domain, $msgid, $category);
}

function T_dcngettext($domain, $singular, $plural, $number, $category)
{
    if (_check_locale_and_function())
        return dcngettext($domain, $singular, $plural, $number, $category);
    else return _dcngettext($domain, $singular, $plural, $number, $category);
}

function T_pgettext($context, $msgid)
{
    if (_check_locale_and_function('pgettext'))
        return pgettext($context, $msgid);
    else
        return _pgettext($context, $msgid);
}

function T_dpgettext($domain, $context, $msgid)
{
    if (_check_locale_and_function('dpgettext'))
        return dpgettext($domain, $context, $msgid);
    else
        return _dpgettext($domain, $context, $msgid);
}

function T_dcpgettext($domain, $context, $msgid, $category)
{
    if (_check_locale_and_function('dcpgettext'))
        return dcpgettext($domain, $context, $msgid, $category);
    else
        return _dcpgettext($domain, $context, $msgid, $category);
}

function T_npgettext($context, $singular, $plural, $number)
{
    if (_check_locale_and_function('npgettext'))
        return npgettext($context, $singular, $plural, $number);
    else
        return _npgettext($context, $singular, $plural, $number);
}

function T_dnpgettext($domain, $context, $singular, $plural, $number)
{
    if (_check_locale_and_function('dnpgettext'))
        return dnpgettext($domain, $context, $singular, $plural, $number);
    else
        return _dnpgettext($domain, $context, $singular, $plural, $number);
}

function T_dcnpgettext($domain, $context, $singular, $plural,
                       $number, $category)
{
    if (_check_locale_and_function('dcnpgettext'))
        return dcnpgettext($domain, $context, $singular,
            $plural, $number, $category);
    else
        return _dcnpgettext($domain, $context, $singular,
            $plural, $number, $category);
}


// Wrappers used as a drop in replacement for the standard gettext functions

if (!function_exists('gettext')) {
    function bindtextdomain($domain, $path)
    {
        return _bindtextdomain($domain, $path);
    }

    function bind_textdomain_codeset($domain, $codeset)
    {
        return _bind_textdomain_codeset($domain, $codeset);
    }

    function textdomain($domain)
    {
        return _textdomain($domain);
    }

    function gettext($msgid)
    {
        return _gettext($msgid);
    }

    function _($msgid)
    {
        return __($msgid);
    }

    function ngettext($singular, $plural, $number)
    {
        return _ngettext($singular, $plural, $number);
    }

    function dgettext($domain, $msgid)
    {
        return _dgettext($domain, $msgid);
    }

    function dngettext($domain, $singular, $plural, $number)
    {
        return _dngettext($domain, $singular, $plural, $number);
    }

    function dcgettext($domain, $msgid, $category)
    {
        return _dcgettext($domain, $msgid, $category);
    }

    function dcngettext($domain, $singular, $plural, $number, $category)
    {
        return _dcngettext($domain, $singular, $plural, $number, $category);
    }

    function pgettext($context, $msgid)
    {
        return _pgettext($context, $msgid);
    }

    function npgettext($context, $singular, $plural, $number)
    {
        return _npgettext($context, $singular, $plural, $number);
    }

    function dpgettext($domain, $context, $msgid)
    {
        return _dpgettext($domain, $context, $msgid);
    }

    function dnpgettext($domain, $context, $singular, $plural, $number)
    {
        return _dnpgettext($domain, $context, $singular, $plural, $number);
    }

    function dcpgettext($domain, $context, $msgid, $category)
    {
        return _dcpgettext($domain, $context, $msgid, $category);
    }

    function dcnpgettext($domain, $context, $singular, $plural,
                         $number, $category)
    {
        return _dcnpgettext($domain, $context, $singular, $plural,
            $number, $category);
    }
}
